Unknown medieval Denar / Pfennig - German ??

[pinpoint]

Friendly ask for help to determine this unknown medieval coin.
Diam. : 14 mm , weight : 0,42 gr. / Silver
a.v : König mit Kreuzzepter und Reichsapfel mit Lilie
rev. : Lamm Gottes ?? legende : E T A .
Coin found in The Netherlands .
Possible German coin ? until now no match in Keunker 130
Any info is welcome !

Greetz from The Netherlands , Pinpoint

[pinpoint]

Hello ,

Until now no reaction on this unkown coin.
Can anyone tell if this coin is German origin ?

Greetz , Pinpoint